Printer and sheet support device

A printer, comprising:

• a holding device that holds a wound strip of paper;
• a printing device that prints paper pulled from the holding device;
• a casing that contains the holding device and the printing device;
• a pair of support shafts that are supported by the casing, inserted into an inner periphery of an ink ribbon wound into a cylinder, and support the ink ribbon hung around the printing device;
• a driven shaft that is connected to one end of each of the support shafts so as to be movable along a longitudinal direction of the corresponding support shaft;
• a biasing member that biases the driven shaft in a direction away from the support shaft;
• a transmitter that is provided to the casing and driven to rotate to transmit rotation to the driven shaft pressed by biasing of the biasing member;
• and
• an attachment that is attachable/detachable to/from the support shaft, is long in the longitudinal direction of the support shaft, and covers an outer periphery of the support shaft.